Transmission mechanism



s sheets-smet 1 N. G. CEDILLO vTRANSMISSION MECHANISM Filed April 27, 1923 Sept. 21 1926.

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sept. K21 192e. 1,600,317

l N. G. CEDILLO l THANSMI SS ION MECHANl SM Filed April 27 1923 5 Sheets-Sheet 2 (Zinnen dow Sept. 2l 1926. A

' N. G. cEDlLLo TRANSMISSION MECHANISM Filed April 27, 1923 5 Sheets-Sheet 3 Patented Sept. i 21, 1926.

UNITED sTArr'Ews i NICK G. oEnI'LLo, or HOUSTON, TEXAS.

TRANSMISSION MCHNISM.

Application mea April 27, i923. serial No. 635,095. i

This invention relates to new and useful improvements in a transmission mechanism.

One object of the invention is to provide a transmission mechanism through which power `may be delivered from a driving to a driven shaft at variable rates of speed and without shifting the connecting gears, thus avoiding. the clashing of gears and the injury thereofiincident to shifting` the same.

lAnother object of the invention is to providefa transmission `mechanism which is very simple inv construction, which may be cheaply manufactured and' which will not readily get out of repair. f j 'Il With the above and other objects Ainjview the invention has particular relation to certain novel features ofconstructi'on, operation and arrangement of parts, an example of which is 'given in thisspecificationand illustrated in the accompanying drawings, wherein:-.y A i v j l Figure 1 is 'a longitudinal sectional view of the transmission. y

Figure 2 is a transverse sectional `view taken on the line 2-4-2 of Figure 1 and,

Figure 3 is a plan view showing'. the transmission casein section. y f

In the drawings the numeral 1 designates a transmission case. Y VThis case has the end bearings 2 and3 in which the driving and driven shafts4 and 5, respectively, rotate. The inner end of the driving` shaft is formedinto a sleeve 6 which has a driving pinion 7 formed integrally therewith, and a driving pinion 8 splined on it. The driven shaft has its inner end extended into said sleeve 6 which forms a* bearing therefor, said end projecting. intosaid sleeverbeing reduced forming the annular bearing shoulder 9 against which the inner end of the sleeve 6 abuts. The pinion 8 is in mesh with the upper -and. lower reverse gears -10 and 11 which are rotatably mounted on y'the bearing pins 12 and 13. The inner ends of these pins 12 and 13 are anchored to the conical shaped web 14 which hasa bearing 15 on the sleeve 6, and the outer ends of said pins are anchored to the'web 16 which surrounds said reverse gears andwhich is formed withV an annular brake drum 17. The reverse gears 1Q and 11 are in mesh with theV bevel gear face 18 of the housing ringv 19. There is a collar 20 keyed on the driven shaft 5 and there are opposing bearing pins 21 and 22 whose outer ends vare anchored tothe there is clutch member 33 which has .the groovedV housing ring 19 and whose inner ends are anchored to said collar 20. Rotatably mounted on these respective pins 21, 22 are the pinions 23, 24- whose inner ends'have bearings against the sleeve 20r and whose outer ends are extended Aforming the sleeves 24'., and splined upon these sleeves are the pinions 25, 26. Arranged opposite the driving pinion? and inmesh with the'pinions 23, 24 there is a bevel gear wheel 27 which has an extended sleeve 28 having a bearing von the driven shaft 5. InV mesh ,with the pinions 25 and 26 lthere is a bevel gear wheel 29 which has a` bearing onY the sleeve 23 and formedA integral with said ybevel gear wheel 29 there is a brake drum "30.

'Spline'd upon the outer end of thelsleeve 2S there is a brake drum 31 which is also formed with'a conical shaped clutch member 32. Splined upon the driven shaft 5 corresponding conical shaped bearing 34 on. saidvv drivenpshaft and interposed' between this bearing and the opposing end of the transmission case there is. a

coil pressure spring 35 which surrounds said driven shaft and which' normally holds said clutch members32 and 33 in engaging posi-v tion. Pivoted to the adjacent end Aof the transmission 'case'there is a yoke 36 having l the arms 37, 37 with the inwardly turned studs 38, 38 which project into the' groove yof the bearing 34 and the yoke has an eX- tended arm 39 by means of which the yoke Imay be manipulated as hereinafter described.

'Surrounding ythe respective drums 17, 3()V and 31 are the brake bands 40, 41, and 42..

When it is desired to throw the transmission in reverse so yas to impart reverse rotation to the driven` shaft thebrake '40 is set so ,as to hold the drum 17 against rotation.

Rotation will then be imparted throughthe f pinionv 8 to the reverse gears 10 and 11 and through them to the annular housing 19, with the gear faceV 18 of which they are in Vmesh andV said housing 19 will be rotated in the. reverse direction and said housing being connected to thedriven shaft 5 through the bearing pins 21 and 22, willy drive said driven shaft rearwardly or in the directionl .pinion Tand being speedV ahead the brake band 4l isset so as tohold the drum against rotation,and the other brake bands are released. The rotation of the driving shaft 4 will then be ,imparted through the pinion Vto the driving pinions 23 and 24, and the driving pinions 25 and 26 which are splined to the sleeves thereof. rl`hese last mentioned pinions being in mesh with the bevel gear face 29, and said last mentioned gearl face being fixed against'rotation, the housing 19 will be forced to rotate'for'wardly, but at a slower rate of 'speed than thedriving` shaft owing to the gear ratio between the pinions 25 and v,2 6 and the "Oear 29,' and said housing being secured to `the driven shaft, through the bearing pins 2Q and2l, said driven shaft .Will be forced vto `rotate therewith. Second speed ahead'is accomplished by setting the brake band 42 on the drum 3l and releasing the-,other brake bands. `This iviltprevent therotationofthe drum 3l and the gear wheel27 which is Ykeyed thereto through they sleeve 2,8'. The driving pinions 23 and 24 will be frotate'd, yas before,through the in mesh with the bevel gear 27 which is held against rotation', said rdriving pinions 23 and 24 will travel around said'gear 27 revolvingthe bearing pins 2 1, 22 and the housing l9`with them and rotat- Uingd the -driven'shaft 5. kvQhe gear ratio,

being` such Vthatv afaster rotation is imparted tothe driven Ashaft v5 than for first speed ahead. vThird speed aheadV is accomplished -by releasingall of the .brake bands and reare connected at one end to one end of the corresponding band and operatedfthrough bearings as 46, and 47 in the transmission case l. The bearings 46' depend from the 'top of the transmission case .and the other end offceach brake band is upturned and formed into a bearing 4S through which the. corresponding brake rod slides and rests against the corresponding bearing 46, and interposed between the ends of the respective brake bands and. surrounding` the 'corresponding brake 'rod there is a coil vpush spring 49 which tends' to Ykeep the corresponding band in expanded orreleased position. Theother ends of these respective rods 43, 44and 45, have pivotal connections with the upstanding arms 50,151 and 52 of thebell cranks 53, 54 and l55,- and the other arms 56, 57 and 58 of saidbell cranks may be 'actuated through the mechanism presentlyT to be described.

Fastened to one side of the transmission case there is a ledge or support` 59 having the opposing bearings 60, 60 spaced apart are adapted toengage. The free ends of 'n the arms 65 engage over the respective arms 57 and 58, and the free 'end of' one ofthe arms 66 engages over the free end of the arm 56, the other arm 66 is fitted through .a U-shaped bearing 7ljcarried bythe free end of the arm of they bell crank 73. The other or upstanding arm 74 of said bell crank is pivoted to the outerV end of the .clutch actuating bar v7 5 which works between the free: end of the yoke arm 39, and the opposing end ofthe crank case. The outer end ofthis bar is notched or oifset and when the barv is actuated outwardly until said odset portion' aligns with the lever 39,'said'lever is permittedto drop down inV said notch and release the spring ywhich thereby operates to engage the clutch memberr33 with the clutch member 32. Vilhen said actuating bar is forced inwardly the sloping shoulder 76 thereof will contact against the free end of the yoke arm 39 and thereby actuate the yoke to disengage the clutch member 33. rvThe actuation of the bar'7 5 is accomplished throughthe lever V62 vby engaging,the4 lug 70 in the notch 65.

When said lever is actuated toward the left it willoperate through the mechanism described to depress the arm 72 and actuate the bar 77 outwardlyfand permit the clutch member 33 to engage. Y The driven member will then be rotated at its highest rate of speed and the lever 62 will be held inthis position by the pull spring 77, ,011e end of which is attached to said lever, andthe other end of which is attached to a fixed anchor. e l/Vhen the lever 62 is in the position indicated all 'of the brake bands .will be Vheld in released ,position by the springs l49. When it is' desired to set the brake 40 the lever y62 may be' actuated to the right. This will operate to disengagethe clutch member 33 and to depress the arm 56 thereby eXertinga pull 'through the bell crank 53 and the rod 43 and setting said brake for reverse.v The brakes 41 and 42 may beset by shiftingthey lever 42 to bring the .lug 69 in engaging position inthe notch 67. f Vhen said lever isthen shifted to the 'right it will operate in an obvious manner through the mechanism described to set the bra-ke 41 and when shifted to the left it Will operate to set the brake 42. The direction of rotation of the driven member and the various rates of speed of it relative to the driving member may thus be readily controlled through the proper manipulation of the lever 62.

lVhat I claim is l. A transmission mechanism including a driving member, a driven member, a plurality of rotatable drums forming also anchors, a pinion carried by one of said anchors and geared to the driving and to the driven members, pinions carried by the driven member and geared to the other anchors respectively and geared also to the driving member, one said last mentioned members being formed With a clutchfmember, a clutch member carried by the driven member and in operative connection there- With, means through which said clutch members may be engaged and released, means for holding the respective anchors against rotation.

2. A transmission mechanism including a driving member, a driven member, a plurality of rotatable drums, forming anchors, a pinion carried by one of said anchors and geared to the driving and to the driven members, pinions carried by the driven member and geared to the other anchors respectively and geared also to the driving member, means through which one of said last mentioned members may be clutched with or released from said driven member, means for holding the respective anchors against rotation, said anchor holding means being releasable to permit the respective anchors to freely rotate.

In testimony whereof yI have signed my name to this specication.

NICK Gr.y CEDILLO. 

